atomic.h File Reference

GCC specific atomic primitives for libmetal. More...

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Macros
#define	ATOMIC_FLAG_INIT   0
#define	ATOMIC_VAR_INIT(VAL)
#define	atomic_flag_test_and_set(FLAG)
#define	atomic_flag_test_and_set_explicit(FLAG, MO)
#define	atomic_flag_clear(FLAG)
#define	atomic_flag_clear_explicit(FLAG, MO)
#define	atomic_init(OBJ, VAL)
#define	atomic_is_lock_free(OBJ)
#define	atomic_store(OBJ, VAL)
#define	atomic_store_explicit(OBJ, VAL, MO)
#define	atomic_load(OBJ)
#define	atomic_load_explicit(OBJ, MO)
#define	atomic_exchange(OBJ, DES)
#define	atomic_exchange_explicit(OBJ, DES, MO)
#define	atomic_compare_exchange_strong(OBJ, EXP, DES)
#define	atomic_compare_exchange_strong_explicit(OBJ, EXP, DES, MO)
#define	atomic_compare_exchange_weak(OBJ, EXP, DES)
#define	atomic_compare_exchange_weak_explicit(OBJ, EXP, DES, MO)
#define	atomic_fetch_add(OBJ, VAL)
#define	atomic_fetch_add_explicit(OBJ, VAL, MO)
#define	atomic_fetch_sub(OBJ, VAL)
#define	atomic_fetch_sub_explicit(OBJ, VAL, MO)
#define	atomic_fetch_or(OBJ, VAL)
#define	atomic_fetch_or_explicit(OBJ, VAL, MO)
#define	atomic_fetch_xor(OBJ, VAL)
#define	atomic_fetch_xor_explicit(OBJ, VAL, MO)
#define	atomic_fetch_and(OBJ, VAL)
#define	atomic_fetch_and_explicit(OBJ, VAL, MO)
#define	atomic_thread_fence(MO)
#define	atomic_signal_fence(MO)

Typedefs
typedef int	atomic_flag
typedef char	atomic_char
typedef unsigned char	atomic_uchar
typedef short	atomic_short
typedef unsigned short	atomic_ushort
typedef int	atomic_int
typedef unsigned int	atomic_uint
typedef atomic_uint	atomic_uintptr_t
typedef long	atomic_long
typedef unsigned long	atomic_ulong
typedef long long	atomic_llong
typedef unsigned long long	atomic_ullong

Enumerations
enum	memory_order {   memory_order_relaxed , memory_order_consume , memory_order_acquire , memory_order_release ,   memory_order_acq_rel , memory_order_seq_cst }

Detailed Description

GCC specific atomic primitives for libmetal.

Macro Definition Documentation

atomic_compare_exchange_strong

#define atomic_compare_exchange_strong	(		OBJ,
			EXP,
			DES )

Value:

({                                                              \
        __typeof__(OBJ) obj = (OBJ);                            \
        __typeof__(EXP) exp = (EXP);                            \
        __typeof__(*obj) expval = *exp;                         \
        __typeof__(*obj) oldval = __sync_val_compare_and_swap(  \
                obj, expval, (DES));                            \
        *exp = oldval;                                          \
        oldval == expval;                                       \
})

atomic_compare_exchange_strong_explicit

#define atomic_compare_exchange_strong_explicit	(		OBJ,
			EXP,
			DES,
			MO )

Value:

atomic_compare_exchange_strong((OBJ), (EXP), (DES))

atomic_compare_exchange_weak

#define atomic_compare_exchange_weak	(		OBJ,
			EXP,
			DES )

Value:

atomic_compare_exchange_strong((OBJ), (EXP), (DES))

atomic_compare_exchange_weak_explicit

#define atomic_compare_exchange_weak_explicit	(		OBJ,
			EXP,
			DES,
			MO )

Value:

atomic_compare_exchange_weak((OBJ), (EXP), (DES))

atomic_exchange

#define atomic_exchange	(		OBJ,
			DES )

Value:

({                                                              \
        __typeof__(OBJ) obj = (OBJ);                            \
        __typeof__(*obj) des = (DES);                           \
        __typeof__(*obj) expval;                                        \
        __typeof__(*obj) oldval = atomic_load(obj);                     \
        do {                                                    \
                expval = oldval;                                \
                oldval = __sync_val_compare_and_swap(           \
                        obj, expval, des);                      \
        } while (oldval != expval);                             \
        oldval;                                                 \
})

atomic_exchange_explicit

#define atomic_exchange_explicit	(		OBJ,
			DES,
			MO )

Value:

atomic_exchange((OBJ), (DES))

atomic_fetch_add

#define atomic_fetch_add	(		OBJ,
			VAL )

Value:

__sync_fetch_and_add((OBJ), (VAL))

atomic_fetch_add_explicit

#define atomic_fetch_add_explicit	(		OBJ,
			VAL,
			MO )

Value:

atomic_fetch_add((OBJ), (VAL))

atomic_fetch_and

#define atomic_fetch_and	(		OBJ,
			VAL )

Value:

__sync_fetch_and_and((OBJ), (VAL))

atomic_fetch_and_explicit

#define atomic_fetch_and_explicit	(		OBJ,
			VAL,
			MO )

Value:

atomic_fetch_and((OBJ), (VAL))

atomic_fetch_or

#define atomic_fetch_or	(		OBJ,
			VAL )

Value:

__sync_fetch_and_or((OBJ), (VAL))

atomic_fetch_or_explicit

#define atomic_fetch_or_explicit	(		OBJ,
			VAL,
			MO )

Value:

atomic_fetch_or((OBJ), (VAL))

atomic_fetch_sub

#define atomic_fetch_sub	(		OBJ,
			VAL )

Value:

__sync_fetch_and_sub((OBJ), (VAL))

atomic_fetch_sub_explicit

#define atomic_fetch_sub_explicit	(		OBJ,
			VAL,
			MO )

Value:

atomic_fetch_sub((OBJ), (VAL))

atomic_fetch_xor

#define atomic_fetch_xor	(		OBJ,
			VAL )

Value:

__sync_fetch_and_xor((OBJ), (VAL))

atomic_fetch_xor_explicit

#define atomic_fetch_xor_explicit	(		OBJ,
			VAL,
			MO )

Value:

atomic_fetch_xor((OBJ), (VAL))

atomic_flag_clear

#define atomic_flag_clear

(

FLAG

)

Value:

__sync_lock_release((FLAG))

atomic_flag_clear_explicit

#define atomic_flag_clear_explicit	(		FLAG,
			MO )

Value:

atomic_flag_clear(FLAG)

ATOMIC_FLAG_INIT

#define ATOMIC_FLAG_INIT   0

atomic_flag_test_and_set

#define atomic_flag_test_and_set

(

FLAG

)

Value:

__sync_lock_test_and_set((FLAG), 1)

atomic_flag_test_and_set_explicit

#define atomic_flag_test_and_set_explicit	(		FLAG,
			MO )

Value:

atomic_flag_test_and_set(FLAG)

atomic_init

#define atomic_init	(		OBJ,
			VAL )

Value:

do { *(OBJ) = (VAL); } while (0)

atomic_is_lock_free

#define atomic_is_lock_free

(

OBJ

)

Value:

(sizeof(*(OBJ)) <= sizeof(long))

atomic_load

#define atomic_load

(

OBJ

)

Value:

({ __sync_synchronize(); *(OBJ); })

atomic_load_explicit

#define atomic_load_explicit	(		OBJ,
			MO )

Value:

atomic_load(OBJ)

atomic_signal_fence

#define atomic_signal_fence

(

MO

)

Value:

__sync_synchronize()

atomic_store

#define atomic_store	(		OBJ,
			VAL )

Value:

do { *(OBJ) = (VAL); __sync_synchronize(); } while (0)

atomic_store_explicit

#define atomic_store_explicit	(		OBJ,
			VAL,
			MO )

Value:

atomic_store((OBJ), (VAL))

atomic_thread_fence

#define atomic_thread_fence

(

MO

)

Value:

__sync_synchronize()

ATOMIC_VAR_INIT

#define ATOMIC_VAR_INIT

(

VAL

)

Value:

(VAL)

Typedef Documentation

atomic_char

typedef char atomic_char

atomic_flag

typedef int atomic_flag

atomic_int

typedef int atomic_int

atomic_llong

typedef long long atomic_llong

atomic_long

typedef long atomic_long

atomic_short

typedef short atomic_short

atomic_uchar

typedef unsigned char atomic_uchar

atomic_uint

typedef unsigned int atomic_uint

atomic_uintptr_t

typedef atomic_uint atomic_uintptr_t

atomic_ullong

typedef unsigned long long atomic_ullong

atomic_ulong

typedef unsigned long atomic_ulong

atomic_ushort

typedef unsigned short atomic_ushort

Enumeration Type Documentation

memory_order

enum memory_order

Enumerator
memory_order_relaxed
memory_order_consume
memory_order_acquire
memory_order_release
memory_order_acq_rel
memory_order_seq_cst